Grit distributing machine



Oct. 31, 1933, N. FRISCH 1,932,928

GRIT DISTRIBUTING MACHINE Filed April 2, 1951 2 Sheets-Sheet l Oct. 31,1933. N. FRISCH GRIT DISTRIBUTING MACHINE Filed April 2, 1931 2Sheets-Sheet 2 Jul/rider.

Patented Oct. 31, 1933 UNITED STATES PATENT OFFICE,

Application April 2, 1931, Serial No. 527,325, and in Germany May 30,1930 2 Claims.

This invention relates to a sand or grit distributing machine withdevices for taking up the material to be distributed heaped on one orboth sides of a road and for uniformly distributing same on tarred oroiled road surfaces by means of a rotating centrifuging cylinder.

Compared with the known constructions the novelty consists in that thecentrifuging cylinder, studded with resilient steel wire and mounted onthe end of a shaft extending in the longitudinal axis of the vehicle, ismade in truncated cone-shape.

The material is by this machine simultaneously rinned and distributedover the width of the road.

An embodiment of the invention is illustrated by way of example in theaccompanying draW- ings in which:

Fig. 1 shows the grit distributor in side elevation, partly in section.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 is a front View of Fig. 1.

Fig. 4 is a side elevation of the adjustable guide plates and of thecentrifuging cylinder.

The rotatable centrifuging cylinder 1, which is conical according to theinvention has a brush like cover 2 of resilient steel wire on itscircumference, by means of which when the vehicle is running on a roadit grips sand, gravel or grit, deposited at the side of the road anddistributes same over the tarred road surface. The centrifuging cylinder1 is keyed on a shaft 3, journaled in bearings 4, 5 and 6 and adapted tobe engagedand disengaged by a reducing and reversing gear '7. This gearis coupled to an engine 8 carried by means of U-section girders 9, 9 onthe vehicle frame 10.

The vehicle frame 10 rests on an axle 11, on the ends of which runningwheels 12 and 13 are mounted by ball bearings.

On the lower end of the vertical front frames 10 and 10 adjustable guideplates 14 and 15 are arranged, adjustable by means of straps 16 and 17relative to the centrifuging cylinder according to the thickness of thebrush cover and fixed by means of wing nuts 19.

The guide plates 14 and 15 may be raised or lowered for limiting thedistance which the grit material is thrown.

The sand or grit distributor is simple to operate and works in thefollowing manner:

The sand or grit material is deposited along one or both sides of theroad to be tarred and in quantities corresponding to the road surface tobe tarred. The sand or grit distributor is run up to the heap 18 so thatthe shaft 3 is almost in the middle of the heap in longitudinaldirection. The centrifuging cylinder 1 rotated during the slow forwardmovement of the sand or grit distributor grips into the sand or gritheap with its elastic brush-like steel wire cover 2 and throws thematerial over the suitably adjusted guide plates 14 or 15, according tothe direction of rotation, so that the material is uniformly distributedover the previously tarred road surface.

Owing to the conical shape of the centrifugal cylinder 1 tapering in thedirection of travel, a uniform taking up of the sand or grit from theheaps 18 is obtained. Moreover, as the circumference of the steel wirecover 2 gradually increases, a centrifuging effect increasing accordingto the size of the cylinder is obtained, so that at the point a of thecircumference the greatest throwing range is obtained and at the point bthe smallest.

I claim:

1. A sand or grit distributor with device for picking up the material tobe distributed heaped on one or both sides of the road and for uniformlydistributing the same on tarred or oiled road surfaces, comprising incombination with a vehicle, a shaft extending in the longitudinal axisof the vehicle, an engine connected to one end of said shaft adapted torotate the same at a high speed, a rotatable centrifuging cylinder oftruncated cone-shape mounted on the other end of said shaft, and a coverof resilient steel wire on the circumference of said cylinder adapted topick up the material to be strewnand to uniformly distribute samedirectly over the surface of the road.

2. In a sand or grit distributor as specified in claim 1, guide platesadjustably mounted on the vehicle frame. v

NIKODEMUS FRISCH.

